Heath Threadwort vs Laysan Duck

Cephaloziella stellulifera compared with Anas laysanensis

Key Differences

• Heath Threadwort is Data Deficient while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Heath Threadwort	Laysan Duck
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Marchantiophyta (liverwort)	Chordata (Chordates)
Class	Jungermanniopsida (Jungermanniopsida)	Aves (Birds)
Order	Jungermanniales (Jungermanniales)	Anseriformes (Anseriformes)
Family	Cephaloziellaceae	Anatidae
Genus	Cephaloziella	Anas
Species	Cephaloziella stellulifera	Anas laysanensis

Conservation Status

Heath Threadwort

DD — Data Deficient

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Heath Threadwort	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Heath Threadwort

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Sweden and United States.

Laysan Duck

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Belgium, France, Netherlands, Norway, and United Kingdom. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Laysan Duck

Laysan Duck (Anas laysanensis) is classified as Critically Endangered (CR) on the IUCN Red List. Facing an extremely high risk of extinction in the wild due to severe population decline and habitat loss.